[argyllcms] Re: Use of DTP-22 digital swatchbook with Argyll CMS

Graeme Gill wrote:
> I understand that the DT22 has quite reasonable accuracy (it
> seems to be based on the same "rotating filter" technology
> as the X-Rite DTP41 series of instruments),

You make me curious. Do you know, how X-Rite's DRS (Dynamic Rotational
Sampling?) spectral engine basically works? I asked Google, and "DRS" is
mentioned in many product brochures and descriptions, but I did not find
a technical description or white paper of the technology. Does it mean,
that these are filter spectrometers, and not based on a grating and a
photo diode array?

Regards,
Gerhard

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